NL106-1 Digitimer AC-DC Amplifier Module

The Digitimer NL106 AC-DC Amplifier Module features continually adjustable amplification and DC offset with output level indication.

The amplification (or attenuation) is adjusted using a calibrated, locking, ten-turn control where the range is set by a switch which gives the two gain ranges of 0 and x10 or 0 and x100.

The input controls are similar to those of conventional oscilloscope vertical amplifiers allowing operation in AC or DC coupled, single-ended (inverting or non-inverting) or differential modes. Up to ±2V DC at either input can be zeroed using the ten-turn DC OFFSET adjustment.

The output voltage is shown by 4 light-emitting diodes: two red LED's show outputs in excess of +50mV and +1V and two green LED's show corresponding negative outputs. Thus, adjustment of gain and DC offset can be accomplished without an oscilloscope monitor.

Low drift, low noise and moderate input impedance make the NL106 suitable either as an amplifier for low impedance sources, or as a variable gain stage following a preamplifier. Each input of the amplifier is accessible through a single pole socket and separate control of AC or DC operation, with the option of amplifier grounding to remove the signal, is provided by a toggle switch adjacent to each input socket.